Food webs

Stochastic Network Interaction Model (SNIM) Tutorial

This is a beautifully simple ecological network model that can simulate predator-prey and competitive multispecies dynamics. This is the B model of the paper 1, I read it long ago and for many years I wanted to make a version of it, finally, I did it. You can find the source code here, to install it you need to clone it using git clone or download and compile it, following the instructions in the README will be enough.

Effects of Macroalgae Loss in an Antarctic Marine Food Web: Applying Extinction Thresholds to Food Web Studies

Antarctica is seriously affected by climate change, particularly at the Western Antarctic Peninsula (WAP) where a rapid regional warming is observed. Potter Cove is a WAP fjord at Shetland Islands that constitutes a biodiversity hotspot where over …

Stochastic Network Interaction Model

SNIM This is a C++11 implementation of a stochastic multispecies model. The model has multiple applications to investigate the relationship between ecological interactions (competition, predation) and diversity. It involves a discrete definition of individuals belonging to a given set of species. The dynamics are essentially probabilistic at the microscopic scale, but it leads to recognizable macroscopic patterns both in space and time. The model in is actual version is spatially implicit but a spatially explicit version is planned (never did it).

Biodiversity is not always top-down regulated

One can think of different ways that biodiversity can be regulated in the framework of food-webs or more generally networks of interactions: Top-down: the effect of predation, hervibory, parasitism Botton-up: food/nutrients Disturbance: In a more microscopic way could also have stabilizing influence or not Trophic interactions Competitive or negative interactions Mutualistic or positive interactions No interactions (Neutral)